Ultra Black RTV is the right stuff. Could your product work? Perhaps. But I KNOW that Ultra Black RTV works because it worked for me and for many others. See, I learned from reading this ENTIRE thread, back four years ago. I read how others had to do the job twice and made up my mind to do it RIGHT and ONCE. Here I am, years later, with NOT ONE DROP of seepage anywhere on the engine.

Just this week, I have told TWO people on Facebook to read this entire thread before proceeding (at least up to my posts, as what I learned was found in the posts up to that point). I prefer to learn from those who went before me, when I saw how some had to do this fix twice in six months, I made up mind to take my time and do it right. "Right" being defined by the likes of MikeR, Maxchion, ALa_Xfire Thorn and others. My mechanical skill is about a 2 of 5; I am only successful by learning directly from those I know can, and have, done the work successfully.